About 3 weeks ago we started noticing an increase in errors generated from Outlook. Outlook is trying to retrie data from the Microsoft Exchnage server server.domain.com. We unteamed the nic's on the exchange server it ran normally for 2 days them started generating the error again. Some users are chached some are not still get this error. Happens intermitantly throughout the day, really bad in the morning around 8 - 9 am. Looks like an RPC call error but all the things we have tried only seem to work temporarily then it degrades again. A large calendar can take 2-5 minutes to open then a few minutes later it will be fine. Server is 2003 SP1, Exchange 2003 SP2 all patches applied. We have been chacing this problem for weeks Microsoft has not been able to fix it either. Any other companies having this issue or had it and found a fix?

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Are the users in question on the same LAN as the Exchange server and the DCs? If they’re connecting to Exchange over a WAN link, then all of their GC references are also happening over the WAN (default behavior, whether you’ve got a GC with the users or not).

Please share a bit of the physical layout of your environment so we can help you out.

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I would try running the Microsoft Exchange Best Practices analyzer tool available at the Microsoft Downloads site. I also recall from somewhere that you shouldn't have your Exchange server do double duty as a Global Catalog server. That should be offloaded to another server. Good luck, and please let us know how it turns out. We all wish Exchange was a bit faster, I think.

The exchange box is not a domain controller, it does not have the GC on it. The (2) AD servers are the GC's, Best Practices Analyzer finds no problems. I am leaning toward this being a AD issue with my primary DC. Does any one know howto repair a GC?

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